JP6537254B2 - Sheet stacking apparatus and image forming apparatus - Google Patents

Description

  The present invention relates to a sheet stacking apparatus for stacking sheets and an image forming apparatus including the same.

  Generally, in an image forming apparatus such as a printer, a sheet feeding cassette for storing sheets is provided in the lower part of the apparatus main body so as to be able to be pulled out and inserted. In such an image forming apparatus, the bottom surface of the sheet feeding cassette constitutes the bottom surface of the apparatus main body, and a projection such as a rib is provided on the bottom surface of the sheet feeding cassette in order to reduce interference between the sheet feeding cassette and the installation surface. An image forming apparatus provided has been proposed (see Patent Document 1).

  There is also known an image forming apparatus provided with a plurality of paper feed cassettes in order to accommodate various types of sheets and large-capacity sheets.

JP 2007-145551 A

  In recent years, downsizing of the image forming apparatus in the height direction is required from the viewpoint of operability and storability of the image forming apparatus. Further, in an image forming apparatus provided with a plurality of paper feed cassettes, the gap between the paper feed cassettes can be reduced by not providing an intermediate cover between the plurality of paper feed cassettes, and the design can be improved. It is required to reduce the cost and reduce the score.

  However, if the paper feed cassettes are provided close to each other as described above, the following problems occur. An example will be described with reference to FIG. As shown in FIG. 14, the image forming apparatus 300 includes sheet cassettes 301 and 302 provided in two upper and lower stages. Upper and lower boundaries on the exterior of the sheet feeding cassettes 301 and 302 are formed by an exterior cover 311 provided on the sheet feeding cassette 301 and an exterior cover 312 provided on the sheet feeding cassette 302. In the state where the sheet feeding cassettes 301 and 302 are stored in the image forming apparatus 300, the gap between the exterior covers 311 and 312 is open by the distance H.

  Here, for example, as shown in FIG. 14B, in a state in which the lower paper cassette 302 is pulled out first, the upper paper cassette 301 full of sheets SS is pulled out. Then, due to the weight of the sheet SS and the cassette 301, the sheet feeding cassette 301 hangs down with elastic deformation of the cassette base and the cassette rail. When the amount of hanging down below the sheet feeding cassette 301 becomes the distance H or more, the corner 311 a of the lower surface of the outer cover 311 interferes with the corner 312 a of the upper surface of the outer covering 312, and the sheet cassette There are cases where the 301 can not be opened sufficiently. As a result, a space necessary for replenishing the sheet SS to the sheet feeding cassette 301 can not be secured, or the lower sheet feeding cassette 302 can not be closed. Even if a projection is provided on the lower surface of the lower sheet feeding cassette 302 as in the sheet feeding cassette described in Patent Document 1, the upper sheet feeding cassette 301 prevents interference with the lower sheet feeding cassette 302. It is not possible.

  Therefore, the present invention provides a sheet stacking apparatus in which the contact portion provided in the second accommodation unit is guided by the guide portion provided in the first accommodation unit, thereby solving the problems described above. To aim.

The present invention relates to a sheet stacking apparatus comprising: an apparatus main body; a first accommodating unit which can be pulled out and inserted into the apparatus main body and stores a sheet; and the first accommodating unit extractable and insertable into the apparatus main body A second accommodating unit provided above the unit and accommodating the sheet, wherein the first accommodating unit is provided at a first accommodating portion for accommodating the sheet and at an end portion of the first accommodating portion in the pulling-out direction a first and outer cover that is, the guide portion, the second housing unit, said in a state where the first housing unit is pulled out from the apparatus main body previously, the second housing unit of the main assembly of the apparatus in deriving from, have a contact portion which is guided in front Symbol guide portion, the guide portion has an inclined surface inclined upward toward the withdrawing direction, continuous to the upper surface of the first outer cover , this The features.
According to the present invention, in the sheet stacking apparatus, an apparatus main body, a first accommodating unit which can be pulled out and inserted into the apparatus main body, and stores a sheet, and can be pulled out and inserted into the apparatus main body A second accommodation unit provided above the accommodation unit for accommodating the sheet, wherein the first accommodation unit has a guide portion, and the second accommodation unit is a second accommodation unit for accommodating the sheet And a second exterior cover provided at an end of the second accommodation portion in the withdrawal direction, and the second accommodation unit as the device body in a state where the first accommodation unit is first withdrawn from the apparatus body And a contact portion guided by the guide portion when pulled out from the housing, and the contact portion is provided so as to project downward from the lower surface of the second exterior cover of the second accommodation unit. Special To.
Further, according to the present invention, in the sheet stacking apparatus, a housing, and a storage unit provided in the housing so as to be drawn out and inserted and storing the sheet, the storage unit has a guide portion on the upper surface, and the lower surface The guide portion and the contact portion overlap each other in the withdrawal direction of the storage unit and the width direction orthogonal to the withdrawal direction, and the guide portion is directed toward the withdrawal direction It has an inclined surface which inclines upward, It is characterized by the above-mentioned.
Further, according to the present invention, in the sheet stacking apparatus, a housing, and a storage unit provided in the housing so as to be drawn out and inserted and storing the sheet, the storage unit includes a guide portion provided on the upper surface, and a lower surface. And a pair of side walls facing each other in a width direction orthogonal to the withdrawal direction of the storage unit, and accommodating the sheet between the pair of side walls, the guide portion and the guide portion The abutment portions are provided between the pair of side walls and overlap each other in the drawing direction and the width direction.

According to the present invention, it is possible to pull out and insert the KuOsamu volume units such impairing operability.

FIG. 1 is an overall schematic view showing a printer according to a first embodiment of the present invention. FIG. The perspective view which shows an upper unit. (A) is a bottom perspective view which shows a storage unit, (b) is an enlarged perspective view which shows a roller. The side perspective view which shows an accommodation unit. (A) is a side view showing an accommodation unit, (b) is an enlarged side view showing a roller. The perspective view which shows the inside of an accommodation unit. (A) is a side perspective view which shows the positional relationship of the accommodation unit of an upper stage and a lower stage, (b) is an expansion perspective view which shows the positional relationship of a roller and a guide member. The side view which shows the state which the roller contact | abutted to the guide member. The side view which shows the rib of other embodiment. The bottom perspective view of the accommodation unit which concerns on 2nd Embodiment. The side perspective view which shows an accommodation unit. (A) is a front view which shows the accommodation unit of upper and lower stages, (b) is an enlarged front view which shows the clearance gap of the accommodation unit of upper and lower stages. (A) is a figure in the state where the cassette was mounted | worn, (b) is a figure in the state in which the cassette was pulled out which shows the conventional image forming apparatus.

First Embodiment
First, a first embodiment of the present invention will be described. The printer 1 (image forming apparatus) according to the embodiment of the present invention is an electrophotographic laser beam printer that forms toner images of four colors. As shown in FIG. 1, the printer 1 includes a sheet stacking unit 10 that stacks sheets, a sheet feeding unit 20 that feeds sheets stacked on the sheet stacking unit, and an image forming unit 30 that forms an image on a sheet. And.

  When an image formation command is output to the printer 1, an image forming process by the image forming unit 30 is started based on image information input from an external computer or the like connected to the printer 1. The image forming unit 30 includes a scanner unit 31, four process cartridges 32Y, 32M, 32C, and 32Bk that form four color images of yellow (Y), magenta (M), cyan (C), and black (Bk). And. The four process cartridges 32Y, 32M, 32C, and 32Bk have the same configuration except that the color of the image to be formed is different, and only the image forming process of the process cartridge 32Y will be described, and the process cartridges 32M, 32C, and 32Bk are described. The description is omitted.

  The scanner unit 31 emits laser light toward the photosensitive drum 33 of the process cartridge 32Y based on the input image information. At this time, the photosensitive drum 33 is previously charged by a charging roller (not shown), and an electrostatic latent image is formed on the photosensitive drum 33 by being irradiated with a laser beam. Thereafter, the electrostatic latent image is developed by the developing roller 35, and a yellow (Y) toner image is formed on the photosensitive drum 33.

  Similarly, toner images of magenta (M), cyan (C) and black (Bk) are formed on the photosensitive drums of the process cartridges 32M, 32C and 32Bk. The toner images of the respective colors formed on the respective photosensitive drums are transferred to the intermediate transfer belt 37 by the primary transfer rollers 36Y, 36M, 36C, 36Bk, and conveyed to the secondary transfer roller 38 by the intermediate transfer belt 37 rotating in the A direction. Be done. The image forming process of each color is performed at a timing of being superimposed on the upstream toner image primarily transferred onto the intermediate transfer belt 37.

  In parallel with the above-described image forming process, the sheet S stacked on the sheet stacking unit 10 (sheet stacking device) is fed by the sheet feeding unit 20. The sheet stacking unit 10 has a cassette 100 provided to be able to be pulled out and inserted into the apparatus main body 1A of the printer 1, and an upper unit 200U and a lower unit 200D provided as an option. The sheet feeding unit 20 includes a pickup roller 11, a feed roller 12, and a retard roller 13. The sheet S stacked on the cassette 100 is fed by the pickup roller 11. The sheets S fed by the pickup roller 11 are separated one by one by the feed roller 12 and the retard roller 13 and conveyed toward the registration roller 15.

  In the upper unit 200U, for example, a sheet having a size different from that of the cassette 100 is stacked, and the sheet is conveyed to the registration roller 15 by the pickup roller 61U, the feed roller 62U, the retard roller 63U, and the conveyance roller pair 64U. Similarly, the lower unit 200D also includes a pickup roller 61D, a feed roller 62D, a retard roller 63D, and a conveyance roller pair 64D. From the cassette 100, the upper unit 200U, and the lower unit 200D, the sheet S is fed according to the selected sheet size.

  The skew is corrected by the registration roller 15, and the first surface of the sheet S conveyed at a predetermined conveyance timing is full color on the intermediate transfer belt 37 by the secondary transfer bias applied to the secondary transfer roller 38. Toner image is transferred. A top sensor 16 for detecting the position of the sheet S and detecting a jam is provided downstream of the registration roller 15 in the sheet conveyance direction. Further, the residual toner remaining on the intermediate transfer belt 37 is collected by the cleaning unit 39.

  The fixing device 41 applies a predetermined heat and pressure to the sheet S on which the toner image has been transferred, and the toner is melted and fixed (fixed). The sheet S having passed through the fixing device 41 is discharged onto the discharge tray 51 by the discharge roller pair 50.

  When forming an image on both sides of the sheet S, the sheet S is guided to the reversing roller pair 53 by the switching member 52. When the rear end of the sheet S passes the switching member 52, the reversing roller pair 53 is reversed and the switching member 52 is driven, and the sheet S is guided to the duplex conveying path 54. The sheet S conveyed to the duplex conveying path 54 is conveyed to the registration roller 15, and a secondary transfer roller 38 forms a toner image on the second surface. Then, the toner image is fixed by the fixing device 41, and the sheet S on which the images are formed on the first surface and the second surface is discharged to the discharge tray 51 by the discharge roller pair 50.

  Next, although upper unit 200U and lower unit 200D are explained in detail, upper unit 200U and lower unit 200D are the same composition. Therefore, in the drawings, the reference numeral "U" represents the configuration of the upper unit 200U, and the reference numeral "D" represents the configuration of the lower unit 200D. Hereinafter, only the upper unit 200U will be basically described, and the description of the lower unit 200D will be omitted.

  The upper unit 200U has a housing 59U connected to the apparatus main body 1A of the printer 1, and an accommodation unit 60U (second accommodation unit) provided so as to be able to be pulled out and inserted into the housing 59U. As shown in FIGS. 2 and 3, the accommodation unit 60U includes an accommodation portion 71U for accommodating a sheet, and an exterior cover 72U provided at an end of the accommodation portion 71U in the withdrawal direction of the accommodation unit 60U. ing.

  As shown in FIG. 4, guide members 75U and 74U which are guided by guide rails (not shown) provided on the housing 59U are provided on the left and right side surfaces of the housing portion 71U. At the front of the exterior cover 72U in the pull-out direction, a grip portion 73U is formed which is operated when the user pulls out and inserts the accommodation unit 60U. The gripping portion 73U is not necessarily required, and instead of operating the gripping portion 73U, the user may grip the end of the exterior cover 72U and pull out and insert the housing unit 60U.

  A rib 76U is formed at the central portion of the accommodation unit 60U in the lower portion (lower surface) of the exterior cover 72U and in the direction orthogonal to the pull-out direction, and the rib 76U rotates the roller 78U (contact portion, rotary body) The shaft 77U is rotatably supported. The roller 78U is provided to project downward from the lower surface 72bU of the exterior cover 72U.

  As shown in FIG. 5, in the upper portion (upper surface) of the exterior cover 72U and in the direction perpendicular to the pull-out direction, a guide portion 80U projecting in the insertion direction is formed at the central portion of the accommodation unit 60U. The guide portion 80U has a guide surface 80aU (inclined surface) which is inclined upward in the withdrawal direction of the accommodation unit 60U and is continuous with the upper surface 72aU of the exterior cover 72U.

  Here, as shown in FIG. 6, the accommodation unit 60D (first accommodation unit) of the lower unit 200D has the same configuration as the accommodation unit 60U, so naturally the rollers 78D (rotary body) and the guide portion 80D are provided. It is done. The lower unit 200D has a lower surface configured as a ground contact surface of the printer 1, but since the roller 78D is provided to project downward from the lower surface 72bD of the exterior cover 72D, the accommodation unit 60D rolls. Can be pulled out smoothly.

  Next, the internal structure of the accommodation unit 60U will be described with reference to FIG. As shown in FIG. 7, the housing unit 60U includes an intermediate plate 81U capable of lifting the stacked sheets, and a rear end regulating member 83U for restricting the rear end which is the upstream end of the sheet on the intermediate plate 81U in the sheet conveying direction. And. The rear end regulating member 83U is configured to be movable upstream or downstream in the sheet conveying direction by the user operating the lever 82U, and at a position according to the size of the sheet stacked on the middle plate 81U. It is positioned.

  In addition, the accommodation unit 60U controls the front side regulation plate 84U and the back side regulation plate 85U as positioning portions for regulating and positioning the position in the width direction orthogonal to the sheet conveying direction of the sheets stacked on the middle plate 81U. Have. The front side regulation plate 84U and the rear side regulation plate 85U are configured to interlock with each other in the width direction in the opposite direction by a rack and a pinion (not shown). The front side regulation plate 84U has a lock mechanism 88U whose movement is restricted by the engagement of the groove formed in the housing portion 71U and the claw formed in the front side regulation plate 84U. When the user operates the operation lever 86U (operation unit), the lock of the lock mechanism is released, and the front side regulation plate 84U can slide (operate).

  The control lever 86U is disposed so as to be offset from the guide portion 80U by a distance L in a direction perpendicular to the pull-out direction. That is, the control lever 86U is disposed at a position different from that of the guide portion 80U in the direction orthogonal to the pull-out direction. As a result, when the user operates the operation lever 86U to position the front side regulation plate 84U and the rear side regulation plate 85U, the guide portion 80U does not get in the way, and operability can be improved.

  Next, the operation when pulling out the housing units 60U and 60D will be described using FIG. In FIG. 8, the user tries to pull out the upper accommodation unit 60U from the housing 59U in a state where the accommodation unit 60D in the lower stage is drawn out from the housing 59D by the maximum stroke. At this time, the sheets are fully loaded in the upper accommodation unit 60U, and the accommodation unit 60U is downwardly deformed by the guide members 74U, 75U and the accommodation portion 71U being elastically deformed by the weight of the seat and the accommodation unit 60. It hangs down on you. The storage unit 60U may not be full of sheets, as long as a sheet heavier than a predetermined weight for lowering the storage unit 60U downward is stacked.

  When the storage unit 60U in the upper stage is further pulled out, as shown in FIG. 9, the rollers 78 provided in the storage unit 60U in the upper stage contact the guide surface 80aD of the guide portion 80D provided in the storage unit 60D in the lower stage. . When the user further pulls out the containing unit 60U, the rollers 78U of the upper containing unit 60U roll on the guide surfaces 80aD and are guided in the pulling direction. At this time, since the guide surface 80aD is formed to be inclined upward toward the pull-out direction, the sheet and the upper-stage storage unit 60U that is hung down by its own weight are scooped up. In addition, since the guide surface 80aD and the upper surface 72aD of the exterior cover 72D are smoothly and continuously formed, the upper accommodation unit 60U can be pulled out stably and reliably to the maximum stroke.

  As a result, a space for stacking sheets in the upper storage unit 60U can be sufficiently secured, and sheet stacking performance can be improved. Further, in the above description, the upper storage unit 60U is pulled out in a state in which the lower storage unit 60D is pulled out first, but the reverse operation is also the same. Further, the same effect can be obtained even when the housing units 60U and 60D are inserted. Therefore, the operability of the accommodation units 60U and 60D can be improved. In particular, in the present embodiment, the accommodation units 60U and 60D are provided close to each other in the vertical direction to improve the miniaturization and the appearance of the printer 1, but the accommodation units 60U and 60D do not interfere, and the operability is improved. Can be improved.

  The inclination angle of the guide surface, the projection amount of the roller 78U with respect to the lower surface 72bU of the exterior cover 72, and the like are appropriately set so that the exterior covers 72U and 72D do not interfere when the accommodation units 60U and 60D are pulled out or inserted. Ru.

  Further, as shown in FIG. 10, instead of the roller 78U, a rib 90U may be provided which protrudes downward from the lower surface 72bU of the exterior cover 72U. More preferably, by providing the rib 90U with a tapered surface 90aU inclined upward in the pull-out direction, the friction between the rib 90U and the guide portion 80D can be reduced, and the accommodation unit 60U can be pulled out smoothly.

  Further, in the present embodiment, the sheet stacking apparatus has been described based on the upper unit 200U and the lower unit 200D provided as an option, but a roller may be provided on the lower surface of the cassette 100. That is, the sheet stacking apparatus may be configured by any two of the cassette 100, the upper unit 200U, and the lower unit 200D that constitute the sheet stacking unit 10.

  Further, the upper unit 200U or the lower unit 200D which is optionally provided as an option in the image forming apparatus such as the printer 1 may be used as the sheet stacking apparatus. In this case, even if the upper units 200U or the lower units 200D are provided in multiple stages in the vertical direction, they do not interfere with each other when the sheet stacking apparatus is pulled out, and the same effect as that of the present embodiment can be obtained.

  Further, the sheet stacking apparatus may be configured by providing a plurality of storage units, such as cassettes 100, in the image forming apparatus, instead of providing the apparatus main body 1A as an option. Here, when the accommodating unit can be pulled out and inserted into the apparatus main body, the apparatus main body of the cassette 100 as the accommodating unit is the apparatus main body 1A of the printer 1. In addition, in the case of the upper unit 200U provided as an option, the housing 59U is the device body.

Second Embodiment
Next, a second embodiment of the present invention will be described. The same reference numerals as in the first embodiment denote the same parts as in the first embodiment, and a description thereof will be omitted. As shown in FIG. 11, the upper housing unit 600U has an exterior cover 72U, and two rollers 780U and 780U (first contact portion, second one) are provided at both ends of the lower surface 72bU of the exterior cover 72U. The contact portion is rotatably supported. That is, the rollers 780U and 780U are provided separately in the direction orthogonal to the drawing direction.

  Moreover, as shown in FIG. 12, two guide parts 800U and 800U (a 1st guide part, a 2nd guide part) are provided in the upper part (upper surface) of accommodation unit 600U. The guide portions 800U and 800U are provided at both ends of the exterior cover 72U so as to be separated in the direction orthogonal to the pull-out direction. The rollers 780U and 780U and the guides 800U and 800U are disposed at corresponding positions in the vertical direction.

  In addition to the effect of improving the operability of the accommodation unit described in the first embodiment, the following effects can be obtained by configuring as in the present embodiment. That is, in the present embodiment, as shown in FIG. 13, when the accommodation units 600U and 600D are attached to the apparatus main body, the upper accommodation unit is mounted on the upper surface 72aD of the exterior cover 72D of the lower accommodation unit 600D. Rollers 780U and 780U of 600U abut. As a result, even if there are variations in the assembly of parts and frames, the gap between the exterior covers 72U and 72D is maintained at a constant distance h, and the appearance can be improved.

  In addition, more than two rollers and a guide part may be provided in an accommodation unit, and the position in which these rollers and a guide part are provided is not limited. In the upper accommodation unit 600U, only a roller may be provided without a guide, and in the lower accommodation unit 600D, only a guide may be provided without a roller.

  The exterior covers 72U and 72D (the second exterior cover and the first exterior cover) may be integrally formed with the accommodating portions 71U and 71D (the second accommodating portion and the first accommodating portion), respectively.

1: Image forming apparatus 1A: apparatus body 10: sheet stacking apparatus 30: image forming unit 59U, 59D: apparatus body (housing) 60D: first accommodation unit (accommodating unit) 60U: second accommodation unit (Accommodating unit) 71D: first accommodating portion, 71U: second accommodating portion, 72aD: upper surface, 72bU: lower surface, 72D: first exterior cover (exterior cover) 72U: second exterior cover (exterior cover), 78U , 78D: contact portion, rotating body (roller), 80U, 80D: guide portion, 80aU, 80aD: inclined surface (guide surface), 84U: positioning portion (front side regulating plate), 85U: positioning portion (rear side side) Regulating plate), 86U: operation unit (operation lever), 88U: lock mechanism, 780U: first contact portion, second contact portion, 800U: first guide portion, second guide portion

Claims (15)

The device body,
A first storage unit which is provided in the apparatus body so as to be able to be pulled out and inserted and which stores a sheet;
And a second accommodating unit provided in the apparatus body so as to be able to be pulled out and inserted and provided above the first accommodating unit to accommodate the sheet.
The first housing unit has a first storage portion for storing sheets, a first outer cover provided at the end of the first housing part in the drawing direction, a guide portion,
Said second housing unit in a state where the first housing unit is pulled out from the apparatus main body above, in deriving the second receiving unit from the apparatus main body, the abutting portion which is guided in front Symbol guide portion I have a,
The guide portion is inclined upward toward the pull-out direction and has an inclined surface continuous with the upper surface of the first exterior cover.
A sheet loading device characterized by   The device body,
  A first storage unit which is provided in the apparatus body so as to be able to be pulled out and inserted and which stores a sheet;
  And a second accommodating unit provided in the apparatus body so as to be able to be pulled out and inserted and provided above the first accommodating unit to accommodate the sheet.
  The first containing unit has a guiding portion,
  The second accommodation unit includes a second accommodation unit for accommodating a sheet, a second exterior cover provided at an end of the second accommodation unit in the pull-out direction, and the first accommodation unit first from the apparatus main body. And a contact portion guided by the guide portion when the second accommodation unit is pulled out of the apparatus main body in the pulled-out state,
  The contact portion is provided so as to project downward from the lower surface of the second exterior cover of the second accommodation unit.
  A sheet loading device characterized by The abutment portion is a rotary body which is rotation rotatably supported,
The sheet stacking apparatus according to claim 1 . The first accommodation unit has a positioning unit for positioning a stored sheet, and an operation unit arranged at a position different from the guide unit in the width direction orthogonal to the drawing direction and capable of operating the positioning unit. ,
The sheet stacking apparatus according to any one of claims 1 to 3 . The operation unit has a lock mechanism, and the positioning unit can be moved by releasing the lock mechanism.
The sheet stacking device according to claim 4 . The guide portion in the width direction orthogonal to the drawing direction, is provided in a central portion of the first housing unit,
The contact portion is provided at a central portion of the second accommodation unit in the width direction.
The sheet stacking apparatus according to any one of claims 1 to 5 .   The first accommodation unit has a pair of first side walls opposed in the width direction across the sheet accommodated in the first accommodation unit,
  The second accommodation unit has a pair of second side walls opposed in the width direction across the sheet accommodated in the second accommodation unit,
  The guide portion is provided between the pair of first side walls in the width direction,
  The contact portion is provided between the pair of second side walls in the width direction.
  The sheet stacking apparatus according to claim 6. The guide portion includes a first guide portion and the second guide portion is spaced apart in the width direction orthogonal to the pull-out direction,
The contact portion includes a first contact portion and a second contact portion provided apart in the width direction.
The sheet stacking apparatus according to any one of claims 1 to 5 . With the housing,
And a storage unit which is provided in the housing so as to be able to be drawn out and inserted and which stores the sheet.
The housing unit has a guide portion on the upper surface, it has a contact portion on the lower surface,
The guide portion and the contact portion overlap each other in a withdrawal direction of the accommodation unit and a width direction orthogonal to the withdrawal direction,
The guide portion has an inclined surface which is inclined upward toward the drawing-out direction,
A sheet loading device characterized by The housing unit has a storage portion for storing a sheet, before Ki引 out direction, and an exterior cover provided at an end portion of the accommodating portion,
The inclined surface is formed so as to be continuous prior to the upper surface of Kigaiso cover,
The sheet stacking device according to claim 9 . The contact portion is provided to project downward from the lower surface of the exterior cover.
The sheet stacking apparatus according to claim 10 .   With the housing,
  And a storage unit which is provided in the housing so as to be able to be drawn out and inserted and which stores the sheet.
  The housing unit has a guide portion provided on the upper surface, an abutment portion provided on the lower surface, and a pair of side walls opposed in a width direction orthogonal to the withdrawal direction of the housing unit. Accommodate the sheet between the side walls,
  The guide portion and the contact portion are provided between the pair of side walls and overlap each other in the drawing direction and the width direction.
  A sheet loading device characterized by The abutment portion is a rotary body which is rotation rotatably supported,
The sheet stacking apparatus according to any one of claims 9 to 12 . The storage unit has a positioning portion for positioning a stored sheet, and an operation portion which is disposed at a position different from the guide portion in a direction orthogonal to the pulling-out direction, and which can operate the positioning portion.
The sheet stacking apparatus according to any one of claims 9 to 13. A sheet stacking apparatus according to any one of claims 1 to 14,
An image forming unit configured to form an image on a sheet conveyed from the sheet stacking apparatus;
An image forming apparatus characterized by

Images